Which NFL Free Agent Will Have the Biggest Impact on His Defense?

Usually, if an NFL team decides to bring in talent via free agency, it's because it not only needs an infusion of talent at a certain position but, more often than not, it has drafted poorly at a certain position in the recent past.

Some acquisitions work out, some flame out—often in spectacular fashion. In the video above, we concentrate on what we think will be the success stories from the 2013 free-agency class on the defensive side of the ball.

Let us know in the comments below where you agree or disagree and which free-agency addition you think will have the biggest impact on his new defense.